The GIMP is a multiplatform photo manipulation tool. GIMP is an acronym for GNU Image Manipulation Program. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching, image composition, and image construction.

It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.

Full suite of painting tools including brushes, a pencil, an airbrush, cloning, etc.

Tile-based memory management so image size is limited only by available disk space

Sub-pixel sampling for all paint tools for high-quality anti-aliasing

Full Alpha channel support

Layers and channels

A procedural database for calling internal GIMP functions from external programs, such as Script-Fu